Shield for circuit-closers.



LP. KELLY. SmELD FOR CIRCUIT GLOSERS. APPLICATION I'ILED'MAY 31, 1912.

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WITNESSES.- I I .JNVEN'TOR,

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A TTORNEY.

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'unirnn STATES PATENT OFFICE. f

JOHN I. KELZY, OF IPITTSFIELD, MASSACHUSETTS.

SHIELD non cmcurr cLosnns.

Specification of Letters Patent.

Patentedd'une 1c, 1914..

Application filed May 2B1, 1912. Serial No. 700,762. I

To all whom it may concern:

Be it known-that I, JdHN F. KELLY, a

cihTzen of the United States of America,

residingat Pittsfield in the county of Berkhshire and State of; Massachusetts, have 1nvented new and useful Improvements in Shieids-.for Cimhit-Glosers, of which the following is a specification. i

This invention relates to improvements iii in circuit/controlling devices as used 1n con.-

nectionwith automatic piano-play1ng 1nst ruinents, andis particularly designed as an improvement on "the construction shown,-

described and claimed. in my prior- Letters Patent, dated Oct. 15, 1912, and numberedhfiddfiii i, in which the note'sheet, duringthe playing *operat-ions, travels through a tank or trough containing mercury and below a tracker bar. I This bar is provided ac with contact terminals to cause the circuit to b'e closed thnough the mercury, by means of suitably arranged openings inthe note sheet, as fully described in the above referred to Letters Patent.

for closing or covering the mercury containingtrough or receptacle during the threading or insertion of the note-sheet in the machine and prior to the playing operaiicns.

r The object of placing a covering device over the mercury contained in the receptacle that many people object to=placing their hands therein during the threading of the note-sheet imder the tracker bar'prior to the playing of a piece of music. Broadly the invention consists of a cover for the mercury receptacle operated from the tracker vTsar during the rising and falling of the same, the connection being such that when the tracker bar is elevated-the cover is an tomatically'moved over the receptacle and j effectively prevents the person that is rethreading the circuit controller from gaininghccess to the mercury in thereceptacle. A. further object of the invention consists in an automatic circuit-breaking device for the motor circuit in which, when the note sheet is detached from the take-up roller at 59 the termination of the rewinding of the note-sheet onto the let-oi? roller, the circuit .to the motor is simultaneously broken, whereby the operation of the machine is stopped, and also at the commencement of 55 the playing of -a place of music, as thenotei 0 The present invention relates to devices sheet is attached to the take-up roller the motor circuit is automaticall v closed.

Referring to the drawings, Figure 1 is an end elevation of my improvement showing thetracker bar elevated and the closer device moved overnthe surface of the mercuit closer, showing 1; pressed in which the n e-sheet is held down below the surface of. the mercury, the closer plate meanwhile being withdrawn out of the path of the note-sheet. Fig. 3 is a front elevation of the winding or take-up roller showingthe circuit connections within the roller which are engaged'by a metallic ring or other suitable device on the end of the cury as shown in dotted lines. Fig. 2 is a sectional view taken tra sversely of the-cire tracker bar. de-

note-sheet so that when this ring is 'at- 'which are. securedup-rights b and 0. These roller d and the let-ofi' roller 6.

1 The note sheet is indicated at f, the receptacle for" containing mercury or other iconducting fluid is shown at g and consists in general of the two-curved portions h and passes during the playing of the piece 0 julls'ic.

The mercury in cat'edat 51'. 7c designates a standard, one lo ated at each end of the machine and extending from one standard to the other-is a tubular member m. Attached to this tubular member pivotally connected together as show-nat 72. The number of arms at and '0 is the same note. The arms 0 are attached to that tracker bar (7 by means of thcplate of insu lation v r. Extending down through the tracker bar are-the contact-terminals s which 2' to form areceptacle or depressed portion Itherebetween and-over which the note-sheet V 4 asthe terminals 8, that is to say one for each, 1

I Referring to the drawings in detail a des-" ignates the base portion of the machine to Tup-rights provide bearings for the take-up I the receptacle? is indiare depending arms n, to which arms io'liire nism by means of vhich the'closer plate '0 is 1 operated' or moved over the surface of the .mercury 9' contained in the receptacle 9 when v the tracker bar 9 is elevated, w designates a "chine and secured "to this she shaft that extends longitudinall of the mais an upwardly-extending arm w .formed with a hook 3 at its upper end that engages the pin 3 of the tracker bar u. This hook and pin construotion is for the purpose of'holding the tracker bar' downward in the position shown in Fig. 2 during theplaying of a piece of music. Also attached to the shaft w is a depending arm 4. .This arm is normally held-in retracted position by means of the spring 5; its lower portion is provided with ,apiecepfsoftironfi adapted to be attracted suitably arranged slot or opening in the note she'et f at the termination of the play-' ing of a pieceof music and prior to the rewinding of the sheet onto the let-off roller e.

, vWhexrthe arm 4: is attracted, the hook 3 which iscarried by the shaft w,-is moved in s the opposite direction to release the tracker bar 9 which is immediately drawn upward into the position shown in Fig. 1 by means of the spring 8, which spring is attached to the arm 9 at one endand to the pin 10 at h The arm 9 is rigidly .COIIIIBCtBd'. ito the links 9 and 9?, latte! being tached tothe tracker bar 9. Connected to the lowcrend of the arm 9 at tl1e;point 11 is a rod 12 which rod is attached to the lever 13 the pin 14. The upper 'end of the lever 13 isformed with a slot 15 which receives the pin 16 on the depending arm 17 of the plate '0. It will now be seen that when the circuit.

1 --is. closed through the magnet 7 bymeans of ,a suitably arranged slot in the note-sheet f as described that, when this slot registers with the proper terminal in the tracker bar 9 it will automatically be'drawn upward into the position shown in Fig. 1 and cause the closer-plate o to move into the dotted line 'positio'nshown. When the plate '21 is in this position the; operator who rethreads the machine is ,thereby prevented from gaining access to the mercury in the'receptacle g.

. Referring now to the mechanism for opening the circuit to the operating motor when the note-sheet f is released from the take-up by the ,magnet 7 when energized from the source of electrical energy by means of a elevated the closer roller (1 at the termination of the rewinding operations. Located within this roller is a each other at the center of the take up roller d as shown at 24; and 25 thereon. In-

this space is inserted the metallic ring or other device 27 which is attached to the end,

ofthe note-sheet f. It will be clear that when this ring is withdrawn from the space 26 at the termination of the rewinding. operations that the motor circuit to the brushes 22 and 23 will be automatically opened and the motor stopped when the note sheet is unwound from the take-up roller (5. 'The osition of the'ring 27 is clearly shown in Fig. 4 when in lace. By means of this construction the circuit-closing device will be opened at the termination of the rewinding operations, thus effecting a saving in electrical energy.

What I claim, is:

1. In a circuit contro1ler device for electrically operated musical instruments, the combination, a guiding device, a note-sheet engaging said device, a conducting fluid, a receptacle for containing the fluid, a cover plate for the receptacle, connecting devices between the guiding device and the cover plates, whereby when the guiding device is elevated the conducting fluid 'is covered.

2. In a circuit controller device, the combination, a tracker bar which is adapted to be elevated and depressed, a note sheet, a

receptacle for containing a conducting It will be noticed that the inner ends of the rods or conductors 18 and 19 are placed a short distance from medium through which the note-sheet is adapted to pass when held in contact with the'tracker bar, a-plate or closer member adapted to be moved over the conducting medium when the bar is elevated therefrom, and connecting devices between said bar and the plate adapted to move the latter when the bar is operated and moved to an elevated position.

, 3. In a circuit controlling device for electrically operated musical instruments, a tracker bar, a note-sheet engaging the same let-off and take-up rollers to permit the note-sheet to move past the tracker bar, an electro-magnet, an electrical conducting medium through which the note-sheet is drawn. during the playing of the instrument, a cover plate for the conducting medium, connections between the tracker bar and the plate, whereby when the tracker bar is plate is moved into a position over the conducting medium.

4. 111 a deser mechanism for electrically operation of the tracker bar to cause if operated circuit closing devices, a receptacle plate to be moved over the conducting fluid for containing a conducting fluid, a note- I when the tracker bar is elevated.

sheet a tracker bar past which the 'note- JOHN KELLL sheet is drawn when in Contact with the con- Witnesses: ductin fluid, a cover plate, means for op- K. I. Cum/mus crating said plate simultaneously with the IIARRY W. BOWEN. 

